Turkish Journal of Physics

Article Title

Influence of Zn Doping on the Magnetic and Electrical Properties of Bi(Pb)SrCaCuO Superconductors




In this paper we report our results on the effect of Zn-doping on the superconductivity properties of the compound Bi_{1.7}Pb_{0.3}Sr_{2}Ca_{2}Zn_{x}Cu_{3-x}O_y for x=0.00, 0.10, 0.15 and 0.20. The zero-resistance temperature (T_{co}) decreases with increasing x up to 0.20. The T_{co} of the pure specimen is 104.5K, while T_{co} for the x=0.20 sample is 90.30K. While the undoped sample has a single transition in R vs T relation, the doped samples show double transitions which become more evident for higher doped level. The volume fractions of the high-T_c phase (2223) and grain size decreased with increasing Zn content.

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